Give me five (5)

As I was driving today CalCars crossed my mind. That's the company that came out with a retrofit for the Prius a couple years ago. Basically they make a super battery that you add to the Prius turning it into a plug-in hybrid. I checked the web to see how much one of the kits costs and one source stated they were about $12,000. So, they don't make alot (or any) economic sense but if you want to get like 100 mpg then here is a way to do it. If you have a Prius that is. Nothing available for the Fusion yet.

So I got to thinking, wouldn't it be cool to have a bigger battery. As we know, you can get about a mile out of the FusionH in the flat just on juice. About a mile and that's all she wrote. How about if we had something like what CalCars makes for the aforementioned Prius. A plug-in Fusion. Then I got to thinking what would be the minimum drivable-under-electric-distance that I would settle for. I figured if I could get 5 miles just on a super battery that would do pretty well. That would take me far enough for most of my trips which are errands in nature. I could run down to the store, go out to lunch, all on electric. Come back and plug it up for the next trip. When I needed a longer then 5 mile run, it would go right back to being the wonderful Fusion Hybrid which is pretty terrific.

So, how many miles would you want for a minimum plug-in and what would you pay for it?

Any Ford engineers out there?